Move testing setup for path-based tenanting into test helper

This was previously in the AR::Tenanted branch we were using, but
feels like it doesn't belong in the gem.

Gemfile

@@ -10,7 +10,7 @@ gem "stimulus-rails"
 gem "turbo-rails"
 
 # Deployment and drivers
-gem "active_record-tenanted", bc: "active_record-tenanted", branch: "flavorjones/path-based-tenanting"
+gem "active_record-tenanted", bc: "active_record-tenanted"
 gem "bootsnap", require: false
 gem "kamal", bc: "kamal", ref: "344e2d79", require: false
 gem "puma", ">= 5.0"

Gemfile.lock

@@ -7,8 +7,7 @@ GIT
 
 GIT
   remote: https://github.com/basecamp/active_record-tenanted
-  revision: 8e33088cdbd69ab7b4cf4100d4202a54aa97e4c0
-  branch: flavorjones/path-based-tenanting
+  revision: 4e4c5b8d7d293780b5b00ef893b3226da5e1fe33
   specs:
     active_record-tenanted (0.1.0)
       activerecord (>= 8.1.alpha)

test/test_helper.rb

@@ -42,6 +42,18 @@ module ActiveSupport
   end
 end
 
+class ActionDispatch::IntegrationTest
+  setup do
+    integration_session.default_url_options[:script_name] = "/#{ApplicationRecord.current_tenant}"
+  end
+end
+
+class ActionDispatch::SystemTestCase
+  setup do
+    self.default_url_options[:script_name] = "/#{ApplicationRecord.current_tenant}"
+  end
+end
+
 RubyLLM.configure do |config|
   config.openai_api_key ||= "DUMMY-TEST-KEY" # Run tests with VCR without having to configure OpenAI API key locally.
 end